IBIC2021 - List of Authors (Singh, R.)

Paper	Title	Page
WEPP16	Comparison of Feschenko BSM and Fast Faraday Cup with Low Energy Ion Beams	407
	R. Singh, W.A. Barth, P. Forck, S. Lauber, M. Miski-Oglu, T. Reichert, T. Sieber GSI, Darmstadt, Germany V.E. Scarpine, D. Sun Fermilab, Batavia, Illinois, USA
	A comparison between Fast Faraday Cup and Feschenko longitudinal bunch shape detectors was recently performed at HELIAC Advanced Demonstrator beamline at GSI. Feschenko bunch shape monitor (BSM) uses the time to space conversion by means of secondary electrons emitted from a wire correlated to a rf deflector, while the fast Faraday cup (FFC) measures the deposited charge in a cup geometry matched to 50 Ohm. The FFC design aims to minimize the bunch shape dilution due to field polarization and secondary electrons produced on irradiation. An He¹⁺ with 100 µA average current and 1.4 MeV/u kinetic energy is utilized for this comparison. A buncher upstream of the detectors was operated to focus the beam longitudinally. The results are discussed in this contribution.
	Poster WEPP16 [1.533 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-WEPP16
About •	paper received ※ 08 September 2021 paper accepted ※ 27 September 2021 issue date ※ 12 October 2021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPP28	Sub-ns Single-Particle Spill Characterization for Slow Extraction	438
	T. Milosic, P. Forck, R. Singh GSI, Darmstadt, Germany
	With the recent developments on improving spill quality at GSI/FAIR, appropriate measurement devices have come into focus again. In contrast to commonly used scaler-based approaches where events at a certain sample frequency are counted, we present a measurement concept resolving single event detector timestamps in the sub-ns regime leveraging a well established off-the-shelf TDC VMEbus module. This allows for high resolution time structure information with respect to the ring RF as well as valuation of inter-particle separation distributions. This yields insightful information for specific experiments at GSI whose efficiencies are heavily limited by pile-ups and detector dead times. We will present the concept of the measurement setup and exemplary data taken in recent campaigns in context of spill microstructure improvements for slow extraction.
	Poster WEPP28 [2.138 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-WEPP28
About •	paper received ※ 08 September 2021 paper accepted ※ 27 September 2021 issue date ※ 12 October 2021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Comparison of Feschenko BSM and Fast Faraday Cup with Low Energy Ion Beams

407

R. Singh, W.A. Barth, P. Forck, S. Lauber, M. Miski-Oglu, T. Reichert, T. Sieber
GSI, Darmstadt, Germany
V.E. Scarpine, D. Sun
Fermilab, Batavia, Illinois, USA

A comparison between Fast Faraday Cup and Feschenko longitudinal bunch shape detectors was recently performed at HELIAC Advanced Demonstrator beamline at GSI. Feschenko bunch shape monitor (BSM) uses the time to space conversion by means of secondary electrons emitted from a wire correlated to a rf deflector, while the fast Faraday cup (FFC) measures the deposited charge in a cup geometry matched to 50 Ohm. The FFC design aims to minimize the bunch shape dilution due to field polarization and secondary electrons produced on irradiation. An He¹⁺ with 100 µA average current and 1.4 MeV/u kinetic energy is utilized for this comparison. A buncher upstream of the detectors was operated to focus the beam longitudinally. The results are discussed in this contribution.

Poster WEPP16 [1.533 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-WEPP16

About •

paper received ※ 08 September 2021 paper accepted ※ 27 September 2021 issue date ※ 12 October 2021

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPP28

Sub-ns Single-Particle Spill Characterization for Slow Extraction

438

T. Milosic, P. Forck, R. Singh
GSI, Darmstadt, Germany

With the recent developments on improving spill quality at GSI/FAIR, appropriate measurement devices have come into focus again. In contrast to commonly used scaler-based approaches where events at a certain sample frequency are counted, we present a measurement concept resolving single event detector timestamps in the sub-ns regime leveraging a well established off-the-shelf TDC VMEbus module. This allows for high resolution time structure information with respect to the ring RF as well as valuation of inter-particle separation distributions. This yields insightful information for specific experiments at GSI whose efficiencies are heavily limited by pile-ups and detector dead times. We will present the concept of the measurement setup and exemplary data taken in recent campaigns in context of spill microstructure improvements for slow extraction.

Poster WEPP28 [2.138 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-WEPP28

About •

paper received ※ 08 September 2021 paper accepted ※ 27 September 2021 issue date ※ 12 October 2021

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)